17
Guarding
The following type of guarding, using the recommended materials and
construction techniques, is required to achieve a safe installation.
WARNING: Never install a laser in such a way that the lens
points to a door or in the direction of an
operator.
When designing a housing for a fibre laser, always use overlaps where
possible to trap the laser light inside the housing, especially for mark on
the fly applications where a product inlet and outlet to the housing are
needed
Access Guards
Access guards are required to prevent direct human access to the laser
beam. In practice, this requires full guarding of the area between, and
including, the laser output lens and the area to be marked on the
substrate.
Note: Guarding is required behind the substrate to prevent access to
the laser beam when the substrate is removed, or following
accidental burn through of the substrate.
Substrate
Laser Beam Path
Access Guard
Laser Head
Lens
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